Landing-chair for elevators.



JI'M. HOWARTH.

LANDING CHAIR FOR ELEVATORS.

APPLICATION FILED JULY 17. 1914.

1,152,318, PatentedAug. 31,1915.

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J. M. HOWARTH.

LANDING CHAIR FOR ELEVATORS.

APPLICATION FILED JULY \7, 1914.

Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

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JOHN M. HOWARTH, 0F WAlTSAU, WISCONSIN, ASSIGNOR OF ONE-FOURTH T0 FRANKC.

DANIELS, OF'WAUSAU, WISCONSIN. l

LANDING-CHAIR FOR ELEVATORS.

Specification of Letters Patent.

Patented Aug. 31, 1915.

To all whom it may concern.

Be it known that 1, JOHN M. HowARrri, a citizen of the United States,residing at VVausau, in the county of Marathon and State of Wisconsin,have invented certain new and useful Improvements in Landing- Chairs forElevators; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in theart to which it appertains to make and use the same.

Thepresent invention relates to landing chairs for elevators, and hasfor an object to provide an improved landing chair for securing theelevator platform against accidental displacement when at rest at alanding.

It is an object of the present invention to provide an improved landingchair for elevator platforms which will insure the platform beingbrought to rest in precise alinement, so as to thereby forma smoothjoint between the platform passage thereover of trucks," carriages orother vehicles employed in the transportation of merchandise and thelike.

It is a further object of the present invention to provide improvementsin landing chairs for elevators which will form a stop upon which theelevator operator may bring the platform to rest without having to eX-ercise any undue care in endeavoring to bring the with the landing.

With these and other objects in viewtne invention consists in the noveldetails of construction and combinations of parts more fully hereinafterdisclosed and particularly pointed out in the claims.

In the accompanying drawings forming a part of this application, and inwhich similar reference symbols indicate corresponding parts in theseveral views: Figure 1 is an elevational view of an elevatorillustrating cooperating landing latches constructed in accordance withthe present invention. Fig.2 is a top plan view of an elevator platformand cooperating latch actuating mechanism, with the latches removed; and

and landing forv the platform to a stop precisely level Fig. 3 is abottom plan view of one of the latches constructed in accordance withthe present invention. eferring more particularly to the drawing, 1designates a piston of the usual steam hydraulic or other suitable typeof elevator, and supporting a platform 2 in the usual manner. Theplatform 2 is operable through the piston 1, by means of the cable 8connected to the valvelever 4L, and operated in a manner as will beunderstood.

The valve lever 42 is connected by a rod 5 to an arm 6 mounted on one ofa pair of rock shafts 7, journaled in brackets. 8 secured to thebuilding structure. The rock shaft 7 to which the arm 6 is connected isprovided with a stub arm 9 depending therefrom, thesame being connectedby a link 10 to an upstanding arm 11 on the companion rock shaft 7. Itwill be understood by the arrangement above described that, uponactuation of the valve lever 4:, through the cable 8, tooperatetheelevator, the rod 5, through the instrumentality of the arm 6, willactuate the associated rock shaft 7, from which latter a similarmovement will be communicated to the companion shaft 7 through the stubarms and connecting link 10.

Eachrock shaft 7 is provided with a plurality of strikers 12, projectingsubstantially horizontally from the shafts and arranged to engage thelower arcuate ends 13 of bent levers 14-, fulcrumed each in a pair ofdepending ears 15 projecting from casings l6 bolted to the underside ofthe landings, as shown.v The bent levers 14 are' formed at their upperends: with spherical heads 17, arranged to occupy sockets 18 produced inlatches 19 mounted for reciproeating movement in casings 16. The casings16 are further provided in the bottom walls thereof with elongated slots20, for permitting of the oscillating movement of the bent levers 14:suflicient to move the latches 19 into and out of the casings, as willbe hereinafter more particularly referred to. The latches 19 areconnected at their rear ends with rods 21, arranged to slide in bearings22 dependent from the gage correspondingly inclined surfaces 26' onlongitudinal flange 27 formed at each underside of the landings. Therods 21 form, with the latches 19, shoulders 23, between which and thebearings 22 are confined coil springs 24, the same encircling the rods21.

The latches .19 are arranged to be-normally projected into the elevatorshaft beyond-the landing and in the path of the elevator platform. 1 Inthis position the upper outerfedges of the latches are preferablyslightly inclined, as indicated at 25, to enedge of the elevatorplatform. The elevator platform 2 is provided with recesses 28 providedwith inclined rear walls 29, arranged in alinement with the severallatches 19, and during upward traverse of the elevator platform theinclined walls 29 are adapted to encounter the beveled undersides 30 ofthe latch ends to force the same inwardly against the action of the coilsprings 2th and permit the passage of the elevator.

form 2 to be at rest, as illustrated in Fig. 1, inorderto descend theoperator pulls upon the cable 3, in the-usual manner, to move the valvelever 4, which simultaneously draws down upon the rod 5 and connectingarm 6, and therebycauses actuation of the rock, shafts 7 Such actionmoves the strikers 1.2 to engage the arcuate ends 13 of the bent levers14, and oscillate the latter about their fulcrums to retract the latches19 within the casings 16 and'out of engagement with the-flange 27 on theplatform 2, so as to permit the same to descend in the usual manner.After the passage of the platform 2, the latches 19, inasmuch aspermitted by the relative positions of the strikers 12 and levers 14,will be projected again into normal position under the influence of ithe springs. 245.

Durm'g ascent the inclined walls 29 of the recesses 28 will encounterthe beveled portions 30 ofthe several latches 19,-and thereby move thesame inwardly and permit the passage of the platform.

[tis to be understood that while I have illustrated the mechanism for asingle'landing,the same may be provided for any numbar of landings andoperate from the valve lever 4 by mechanism similar to that herein shownand described.

It is obvious that those skilled in the art may vary the details ofconstruction and arrangement of parts without departing from the spiritof my invention, and therefore I do not wish to be limited to suchfeatures except as may be required by the claims.

I claim: k i 1. The combination with an elevator and operating meanstherefor, of latches mounted on the landing and arranged to project intothe elevator shaft and form a support tions arranged between said rockshafts and latches for engaging and operating to retract the latteragainst the infiuence of said first-named means during descent of theelevator platform, substantially as described.

2. The combination of an elevator and operating means therefor, oflatches mounted on the landing and arranged to project into the elevatorshaft and form a support for the platform, levers associated with saidlatches, rock shafts, connections for actuating said rock shafts fromthe elevator operating means, and means on said rock shafts for engagingand operating said levers to re- Tn practice, assuming the elevatorplattractsaid latches, substantially as described.

3. The combination of an. elevator and operating means therefor, oflatches mounted on the landing and arranged to project into the elevatorshaft and form a support for the platform, spring means for normallyholding said latches in projected position, rock shafts, connectionsbetween said rock shafts and the elevator operating means, and meansarranged between said rock shafts and latches for retracting the latterduring descent of the elevator platform, substantially as described.

a. The combination of an elevator and operating means therefor, oflatches mounted on the landing and arranged to project into the elevatorshaft and form a support for the platform, levers associated with saidlatches, 1. ock shafts, strikers projecting from said rock shafts andarranged to engage and move said levers to retract the latches, andmeans for actuating said rock shafts from the elevator operating means,substantially as described.

5. The combination of an elevator and operating means therefor, oflatches mounted in the landing arranged to project into the elevatorshaftand form a support for the platform, levers associated with saidlatches, a pair of rock shafts journaled to either side of the elevatorshaft, means for connecting said rock shafts to move together,connections for actuating said rock shafts from the elevator operatingmeans, and connections between said rock shafts and levers for engagingand moving the latter to retract the latches, substantially asdescribed.

6. The combination of an elevator and operating means therefor, oflatches mounted to reciprocate in the landing and arranged to projectinto the elevator shaft and form a support for the platform, springmeans arranged to normally hold said latches in projected position,levers associated with said latches, a pair of rock shafts journaled toeither side of the elevator shaft, means for connecting said rock shaftsto move in unison, connections between one of said rock shafts and theelevator operating means, and strikers on said rock shaft adapted toengage and move said levers to retract the latches, substantially asdescribed.

In testimony whereof, I affix my signature, in presence of twowitnesses.

JOHN M. HOWARTH. Witnesses:

F. (J. DANmLs, L. WENDORF.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0'.

